What to do when you realize you've been played but have mutual friends?

Met this guy through a great guy friend. We're both in our mid-late 20s. He completely charmed me. I fell for it hook, line and sinker. Near the end of our date, all he wanted to do was get in my pants. I told him to slow down and all he did was feel me up. After our date, we're having steamy conversations on FB. I realized I needed to tell him I'm not ready to go that far in person and to slow down a lot. He said "lame" and went to bed.

Obviously, he stopped texting and messaging as much as before and waiting longer intervals between messages. I'm fine with that because I'm glad I realized it now before I went further with him, than after. He's messaging once in a while and I'm just wondering how to make this less awkward (for me at least) when we are chatting online.

Or even meeting in person because we do have mutual friends. I don't want him to think I'm still mooning over him but I feel if I just cut him off , it'll make it more obvious and awkward when we met in a social setting. I feel like everyone is going to know what happened between us.

I'm also thinking he might be messaging once in a while to see if I've changed my mind. Our dynamic has definitely changed though. I'm a horrible actor by the way. Any tips/advice appreciated!